NM_007194.4(CHEK2):c.138G>A (p.Met46Ile) AND Familial cancer of breast

Germline classification:: Uncertain significance (2 submissions)
Last evaluated:: Jun 5, 2021
Review status:: 2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000536362.12

Allele description [Variation Report for NM_007194.4(CHEK2):c.138G>A (p.Met46Ile)]

NM_007194.4(CHEK2):c.138G>A (p.Met46Ile)

Gene:

CHEK2:checkpoint kinase 2 [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

22q12.1

Genomic location:

Preferred name:

NM_007194.4(CHEK2):c.138G>A (p.Met46Ile)

HGVS:

NC_000022.11:g.28734584C>T
NG_008150.2:g.12283G>A
NM_001005735.2:c.138G>A
NM_001257387.2:c.-640G>A
NM_001349956.2:c.138G>A
NM_007194.4:c.138G>AMANE SELECT
NM_145862.2:c.138G>A
NP_001005735.1:p.Met46Ile
NP_001336885.1:p.Met46Ile
NP_009125.1:p.Met46Ile
NP_665861.1:p.Met46Ile
LRG_302t1:c.138G>A
LRG_302:g.12283G>A
LRG_302p1:p.Met46Ile
NC_000022.10:g.29130572C>T
NG_008150.1:g.12251G>A
NM_007194.3:c.138G>A

Protein change:

M46I

Links:

dbSNP: rs876660873

NCBI 1000 Genomes Browser:

rs876660873

Molecular consequence:

NM_001257387.2:c.-640G>A - 5 prime UTR variant - [Sequence Ontology: SO:0001623]
NM_001005735.2:c.138G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001349956.2:c.138G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_007194.4:c.138G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_145862.2:c.138G>A - missense variant - [Sequence Ontology: SO:0001583]

Condition(s)

Name:: Familial cancer of breast
Synonyms:: Breast cancer, familial; Hereditary breast cancer
Identifiers:: MONDO: MONDO:0016419; MedGen: C0346153; OMIM: 114480

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000633130	Labcorp Genetics (formerly Invitae), Labcorp	criteria provided, single submitter (Invitae Variant Classification Sherloc (09022015))	Uncertain significance (Jun 5, 2021)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000839505	Mendelics	criteria provided, single submitter (Mendelics Assertion Criteria 2017)	Uncertain significance (Jul 2, 2018)	unknown	clinical testing	Citation Link

Submission Accession

Submitter

Review Status
(Assertion method)

Clinical Significance
(Last evaluated)

Origin

Method

Citations

SCV000633130

Labcorp Genetics (formerly Invitae), Labcorp

criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))

Uncertain significance
(Jun 5, 2021)

germline

clinical testing

PubMed (1)
[See all records that cite this PMID]

SCV000839505

Mendelics

criteria provided, single submitter

(Mendelics Assertion Criteria 2017)

Uncertain significance
(Jul 2, 2018)

unknown

clinical testing

Citation Link

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	unknown	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]

PMID:: 28492532
PMCID:: PMC5632818

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000633130.6

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	PubMed (1)

Description

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies and their clinical significance is uncertain. This variant has not been reported in the literature in individuals with CHEK2-related disease. ClinVar contains an entry for this variant (Variation ID: 234137). This variant is not present in population databases (ExAC no frequency). This sequence change replaces methionine with isoleucine at codon 46 of the CHEK2 protein (p.Met46Ile). The methionine residue is weakly conserved and there is a small physicochemical difference between methionine and isoleucine.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Mendelics, SCV000839505.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	clinical testing	not provided

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	unknown	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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